Answer:
Explanation:
2. A compression wave, like sound, is a kind of <u>mechanical</u> wave.
3. When a wave reflects off a surface, the angle of <u>incidence</u> always equals the angle of <u>reflection</u>.
4. The wailing change of the pitch that you hear as a locomotive approaches and then recedes from you is called <u>Doppler Shift</u>.
Ke= 1/2 mv ^ 2
15x 15 = 225
225 x 30 = 6750
6750/2 = 3375 J
Ke = 3375 J
Answer:
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Explanation:
